Improvement in connecting-links and hooks



noiiiiiifr cnicnziinnn, or New" venia, N. Y..

` Lette/S Patent No. 63,996, (tctcqfl April 23, 13137.

Y IMPROVEMENT 1N commettre-LINKS AND Hooits.

4 .diL-tttiiilt-ninrntt,in tlicsttttni htintgiin'siiinjiiiignnift uf thc anni.

TO ALL WHOM IT MAY'GONCRN:

Be it known that I, ROBERT CREUZBAUR, of the city and county of New York, Sta-te of New-York, have invented an 4Iiiiprovenient in Con'nectingliinks :ind Hooks j. and Il do hereby declare that 'the following is a full,

clear, and exact description thereof, reference boing:r had to the accompanying drawings, making a pai-tof this specification, 'in which- Figures 1, 3, 4,5, i', 9, 10, 11, I2, of sheet 1; show my improvement applied toa connecting-linkin' an S-sha'po. l V

Figures 13, A14, and I5, sheet 2, show my iinprovuiiient applied-.to a fsistor hook." Figuresl, 17, und 18, sheet 2, 'show the'improvement applied to a connecting-link of a C-shape. Similar letters of reference indicate'corresponding parts in the several figures. l This invention relates to anY improvement on `the patent which was granted on the 13th day of November,

' 1 u q n ai V l .I A i a n v 1860, for a universal connecting-link, which consisted in connecting,` two'S-shaped pieces of metal. together by means of a central pivot, so thatnverlzipping hooks are produced oireacli side of said pivot, which iorm a selfliolding link. It also relates to an improvcnientin overlapping hooks known as sister hooks." and to all varieties and forms of overlapping. hooks and links which are liable to straighten ont when subjected to endwise str-ain exceeding thetransverse strength of their parts. The object of n iy invention is to increase the strength of such links .and hooks, from the lateral or transverse resistance of the material, which heretofore formed their base of resistance, to the tensile or cohesive strength of the material used, thereby greatly increasing thestrength -of the-vlieeks, and links without--inouans'iagithe-tnimtit-ytotfnwterialfas'livilhbe.hexeinaftruinseribet Another ohjeetef my invention is to provide for locking .connecting-links, so as to prevent their, accidental detachment under all circumstances. I I i To enable others skilled in the art Vto understand my invcntion,`I will describe its construction :and operation. In theaccompanying drawings, sheet 1, I have represented severa-l iriodes of applying` my invention to the S-sliaped links, `and in. s'lieet2 I have represented my invention applied to a lin-k which is of tivo C-shaped sections pivoted togietlier.V This form of link I do not desire to claim under the present application for alpatent us I intend uiakin'g it the suhjectof a separate application; I I

In figs. 1, 2, ccd3, A Af represent two S-shaped plates, which may he made oi' flat or half-round metal,

and bent in the required shape by means of suitable bending and swagiiig machinery. These links-A A are` constructed With shoulders oi' stops a a, and inclined planes b b on their impinging sides, which vshoulders ahnt against eil-cli other when the two parts of the link. are brought together, as represented in lig. l. These shoulder Vstops it are plainly represented oiil tlievlinl'c A, of tig.` 5, whichV corresponds in every particular to the link A. that is. usedin connection with it to close the/spaces at its4 ends. These two senti/ons A A', are pint together in reverse order, and.' pivoted` together in the centre by means of a stud, e, which has a head formed on one end. This stud is riveted to one of the links,l and provided with a dat spring,f, that keeps the two parts nl the link together, andprevents their casu-nl displacement wlieniii use. The neck ofthe pivot or stud ,e is of'vsuchleiigth as will allow the pnrtsA A-th be separated, so. that 'the shoulders of one part will clear the corresponding shoulders on the other part, thus allowing the links to be opened and applied to or removed from the link of a chain or other object. The springfis kept in place ljy seating its eiids1into notches, gg, which are formed in the link A', as shown in g. I, and also by means of the enlarged head of the pivot e, so that' this spring forms a very goed lock 'for keepin-Di the two' link sections in a proper relation to each other.= .In iigs. 4, 5, and 6, another mode of applying my invention 'is represented, which consists in forming interlocking shoulders, Y1. la

v. which are concentric to the axis of the pivot c', which latter is in this inst-ance a rivet. The shoulders or tongues and grooves h may he swaged upon the S-sliaped plates, and then finished in a lathe, the concentric elevators or tongues on one "part, A, of the link, being tted to slide smoothly in corresponding grooves in the other part, A, of the link,`n.s slfown in iig. 5. 'Such q. link may he locked, or prevented from working too loosely,.

by making a V-shapcd elevation, z', Figure 3%, on the end of oneoi' the two parts A A', and a corresponding intleng,

tation on the other part. The projection is made with a centre-punclw after the link is otherwise ,complete fiished. In closingthis link the elevation will springliits vhalves apart until the projection drops into its.I recess, when it will 'retain the two parts in place. ei'fihe linkfrepi'esentefl in figs. fi', 8, and 9, is constructed with shoulder :ihntinents on the impinging faces, like the link'ot` figs. 1, 2, und 3, but infend of using nv spring,j`,

this link, of figs. 7, 8,-und if. has its two parts made slightly thinner in the middle, around the pivot, that when-1" put together and brought in l'orfrihle Contact by menus of n s'erew pivot, c", they will stand slightly apart, ns

lfnownA in iig. S. This will hrinp'` n. continued henring upon the screw u when it is set up tightly, and will pre- \ent it from becoming Cusnnlly loose. B v pressing the two pnl-ts A Atogether in the centre, the screw a: muy lie loosened with the fingers, without the :lid oi' :in instrument. 0.x the other hund, in closing the link. the

sere-w een. he set Vup tightly in the suine nntnner. with the {ingers only. In this link the hnlf A, next te the-head oi' 'the -screw 1:2, works loosely on the hitter, without screw-threads, und the other half, A', has screwJtlneznls through itLnnd also :in elevntion, c', on theoutside, in which the henrdeder swelled end of the screw e njorltr'V into eurresporiding:r depressions in each part. The method ofeonneeting the-two purts of this linl-z together :indl

""eely. 'lhe linl. which I have shown in figs. 1U. 11, and 12, is constructed with studs s s on each Part. fitting' yeilocking them in place, muy he like thnt shown in iig. 1, where n spriniv is used, or like that shown in fig. i',

where n screw 4pivot is used. The saune modes ns herein described muy be adopted for strengthening hooks Vwhich are constructed to lai-p 'over the other, ns shown in figs. 13, 14, and l5, which represent u."sister hookl l hnving its 'overlapping portions strengthened by forming tongue-and-groove nbutrnents on their impinging sides, which tongue and groove are curved concentric to the exis of the pivot 7). In figs. 16, 1T, and 18, I have represented the tongnelnndfgroove n-bntmenfs applied to the impinging faces of C-sheped vlinks B B, which ere pivoted together nt or near-one end. This i'orin otl link inziy be locked by means of. n. leather thong, or by n. screw, us niny he desired. I dp not confine myself to any deiinite size, or relative .proportions in the construction of the links nud hooks, ns these' will vary :record-ing to the material of which they are mede, und the strength required of them; nor do I confino myself to any particular ,mode of utilizing the tensile ,or cohesive strngth of the innterinl used instead of the transverse or lateral strength of the same, as the invention is susceptible of a. variety ofinodifications other than those herein represented.

What chliin 'as new, :nid desire to secure by Letters'Petent, is- 1. Providing links and hooks with strengtheningshoulders, substantially es described. 2. Providing for locking :is well as strengtheningconnecting-links, substantially ns described.

l ROBERT CREUZBAUR.

Witnesses? l Lewis C. mex', J r., Geo. H. F. GRAY. 

